package com.guosheng.netty;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

public class NettyTimeClient {
    public void connect(int port,String hostname){
        //配置客户端NIO线程组
        EventLoopGroup group = new NioEventLoopGroup();
        Bootstrap b = new Bootstrap();
        b.group(group).channel(NioSocketChannel.class)
                .option(ChannelOption.TCP_NODELAY,true)
                .handler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    protected void initChannel(SocketChannel socketChannel) throws Exception {
                        socketChannel.pipeline().addLast(new TimeClientHandler());
                    }
                });
        //发起异步连接操作
        try {
            ChannelFuture f = b.connect(hostname,port).sync();
            //等待客户端链路关闭
            f.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            //优雅退出，释放NIO线程组
            group.shutdownGracefully();
        }

    }

    public static void main(String[] args){
        new NettyTimeClient().connect(7272,"127.0.0.1");
    }
}
